Improvement in harrows



J. JAcoBsoN.

Harrow.

No. 108,920. I 0 Patented Nov. 1, 1870.

socket, in which the axle ot' the rollers B and B may von every other roller. I he teeth are placed on the JOHN JACOBSON, 0F AUSTIN, MINNESOTA.

Leaers Patent No. 108,910, dated November 1, 1870.

lIMPROVEME'NT IN HARROWS.

The Schedule referred to in these Letters Patent and making part of the same.

in 2 and 3, said knives to be about the sauic length, and placed in the same manner 'as the teeth.

The relative position of theteeth requires that the .rollers are placed in couples-aud, consequently, au even number of rollers have to be employed. Any shape of teeth in. y be used, but I prefer long-teeth, the points ot' which are bent forward, as shownI in figs 2 and 3.

lhe teeth C and knives D are adjustable, aud'either fc all Iwhomt't may concern y lie it known that I, JOI-1N JACOUSON, oli' Austin, in the conntybf Mower and in the State of Minneseta, have invented a new and useful Invention in Ilarrows; and Ido hereby declare thel following to he a full, clear, and exact'dcscription of the same, reference being had to the accompanying drawing mak-- ingr part ofthis specification, in which-` v Figure lis a plan view of the harrow, showing the rollers without the teeth.l

Figure 2 is a vertical longitudinal section ou line rollers B and B', or by some other device secured 'in X, iig. l. the rollers. If a tooth or knife secr/11d happen to Figure 3 is a side elevation. f, break, or otherwise .be rendered unserviceable, an- Figure 4 is part of a bottoni 'view of the frame, othertooth or knife niayiasily be substituted. 'showing the bearings in which the rollers rotate. Ihc seat E extends all across the Ywidth of the Figure 5 is a plan view of a harrow in which the li'alne A, and ought to be large enough to prevent the frame and the rollers consist of oneor' more sections. driver from being thrown down on the teeth. of the The same letters of reference employed in the sevbarrow. eral figures denote identical parts. (i represents wheels, fastened to the legs H, which 'I he nature of niyA invention consists in the arare pivotc'd to thc outer vertical sides of' the frame A, rangement of the teeth on the rollers, iu providing as shown in iigzl. the front rollers with knives instead of teeth, and in Then the barrow is worked the legs H are turned the employment of wheels Vattached to pivoted legs, upward, resting against a clamp, I, placing the wheels in such a manner that the harrow may either rest on G in a position above the frame A, as shown in tig. the teeth when at work, or on the wheels when at 2. In such a position the legs H rest on aprojectiou rest. The frame in which the rollers are placed may formed between the clamp I and the frame A, as either consist of one or more parts, connected together, shown in dotted lines in figs. 2 and 3. and the rollers may also consist of one or more parts, When the barrow is drawn from one place to anas will be hereafter described. other, and its teeth not desired to come in contact A represents a rectangular frame, supporting a sewith the ground, then the legsv H are swung downries ot' parallel roilers l, which rest in bearings, F, ward, resting against a clamp, K, which is secured on secured to the lower edges of the two opposite rails the outside of the, frame A, as shown in iig. 3, and of the frame, as shown in fig. 4 in the drawing. the harrow is then rest-ing ou the wheels G, as shown The bearings F consist ot' bars ot' wrought-iron, at in tig. 3. each end curved sullicicntly to serve as a hub or Fig. 5 shows a pla-n view of a-harrow consist-ing of Inore sections, which are hinged toeach other, 0r by some other device so connected, that the operator may attach or detach one or more sections. .lhe rollers I5 and B are also, in the same figure, represented in sections, so that the operator may detach one or more parts.`

Having thus described my invention,

What I claim, and desire to secure by Letters Patent, is

Ihe construction and arrangement of a barrow, the front rollers of which are provided with knives; and the other rollers of whichl the barrow may consist are provided with teeth, arranged substantially as and for the purpose'set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN J AOOBSON.

be supported and rotated. The beariu F are screwed on, or otherwise secured to the frame, in such a manner that they nza-y be attached and detached with case.

Fig. l shows the apertures C iu the rollers B, ito which the teeth are to be inserted. 1t will be observed that said apertures are placed in spiral lines around the-rollers, and that the spiral line isreversed dili'erent rollers, so that they shall not interfere with each other, but the teeth of one rollerjshall pass hctween the' teeth ot' the adjoining rollers. v-

'hen thc teeth are placed in above-described inanner,` they will break the clods of soil which may come between thorn with greater case, and are not so liable to pass over theln without having the desired effect, as when they are placedin straight parallel rows on the rollers.

In order to prevent brushwood, stalks, &c., from getting between and clinging to the teeth, I provide the Iwo front rollers with knives instead of teeth, as shown Witnesses:

J. S. Ineens, TH. InGENs.

placed in sockets, secured in the aperturesrO.'` o.'- "l 

